I bought Olympus OM-D E-M10 that comes with 14-42mm EZ lens. I also have Olympus ED 14-150mm lens. When the first time I got it, when I attached the 14-42mm EZ lens, the screen went black but you can see all other indicators (picture counts etc) if you look in the viewfinder. I unscrewed and screwed it back couple of time and it didn't work so Amazon sent in a replacement for it. On the second camera, I have been switching back and forward between 14-42mm and 14-150mm lens (every two weeks or so). Then a couple days ago, the camera won't recognize the 14-42mm, when I attached the lens, I got black screen (but can see the indicators on the screen). I kept on trying and it wouldn't do the trick. Then I reattached 14-150mm back and it worked just fine, I tried several times to detach and reattach and no problem. Is this mean I'm having camera problem or lens problem?